Boing is the 9th level of Bloons. It features the Rubber Block for the first time.


  • Hitting the fourth rubber block from the top is one way of beating this level.


  • It consists of two groups of bloons of differing proportions divided by eight Metal Blocks and a column of rubber blocks on the right side.
  • The level requires large use of the newly introduced block, which explains the derivation of the level name.

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